/Engine/Plugins/Experimental/LandscapePatch/Source/LandscapePatch/Public/LandscapeCircleHeightPatch.h
TODO: For now the height patches have a similar interface to blueprint brushes, but this is likely to change. We are likely to pass a graph builder to the patches instead, along with an area that we want affected.
virtual void Initialize_Native ( const FTransform & InLandscapeTransform, const FIntPoint & InLandscapeSize, const FIntPoint & InLandscapeRenderTargetSize )